W83115RG-965

Application Specific Clock/Timing Overview

The W83115RG-965 is a CK505-compatible clock synthesizer designed for Intel chipsets, operating on a 3.3V supply with a 14.318 MHz crystal input. It generates CPU, PCI, SRC, SATA, and DOT clocks via step-less frequency programming across 32 settings. The device supports smooth transitions between frequencies from 100 to 400 MHz and includes I2C serial bus interface for register configuration. Key electrical features include differential push-pull outputs for CPU and SRC, five PCI outputs, and a 48 MHz USB clock output.

Application Specific Clock/Timing Feature Summary

• Provides 2 pairs of differential CPU clocks, 7 pairs of SRC clocks, and 5 PCI outputs
• Supports step-less frequency programming with smooth switching from 100 to 400 MHz
• Includes -0.5% down-type spread spectrum modulation for EMI reduction
• Features I2C 2-wire serial interface for enabling/disabling outputs and configuring slew rate/skew

Application Specific Clock/Timing Applications

• Intel chipset-based computer systems
• High-speed microprocessor clock generation
• SATA and DOT clock distribution

Application Specific Clock/Timing Procurement Notes

Verify the 56-SSOP package dimensions against PCB footprint requirements. Confirm that the 3.3V supply voltage aligns with system power rails. Ensure the 14.318 MHz reference crystal matches the input specifications. Check for availability as this component may be subject to end-of-life status or obsolescence notices.

Application Specific Clock/Timing Selection Notes

Select this part when an Intel chipset-compatible clock generator is required. It is suitable for designs needing multiple differential clock domains (CPU/SRC) and programmable PCI frequencies. Consider the I2C control requirement for dynamic clock management. Verify that the SSOP56 package fits the assembly constraints.

Application Specific Clock/Timing Part Context

This component belongs to the W831xx series of clock generators by Nuvoton Technology Corporation. It serves as a replacement or equivalent for the CK505 clock synthesizer commonly used in legacy and industrial PC architectures. The device integrates multiple clock outputs into a single IC to reduce board space compared to discrete solutions.

Application Specific Clock/Timing Replacement Considerations

The datasheet identifies the W83115RG-965 as a CK505 Clock Synthesizer. Direct pin-to-pin replacements should be verified against specific Intel chipset compatibility lists. Alternative parts must support the same 3.3V operation, 14.318 MHz input, and 56-SSOP package.